Operation Steps; Measurement Preparation - Elitech DMG-4B User Manual

3 Operation steps

3.1 Measurement Preparation

1. Press the power button to turn on the device and enter the main
interface.
2. Calibrate the pressure sensor to zero (long press
Perform zero calibration of the pressure sensor before each
!
measurement ( zero calibration range: 1-100psi ) .
Before zeroing, be sure to cut off the connection of the instrument
!
with any pressure source, and keep it balanced with the external
pressure.
3. Connect the refrigerant hose.
The low-pressure end refrigerant pipe (blue) and the high-pressure
!
end refrigerant pipe (red) are respectively connected to the
instrument and connected to the system under test.
4. Set the refrigerant, (long press
or switch the refrigerant type).
3.2 Pressure Temperature Measurement Mode(PT)
After the refrigerant setting is completed, read the system data, and
the interface (Figure 1) displays the measured pressure value,
evaporation temperature value and condensation temperature value
of the high and low pressure sides.
Figure 1 Pressure temperature mode
+ unlock, then short press
to zero).